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Filtering objects based on present/missing key

Find users that have a non-empty name field.

$ echo '{
"users": [
{
"name": "Tom"
},
{
"name": "false"
},
{
"name": true
},
{
"wrong_name": "Jim"
},
{
"name": ""
}
]
}' | dasel -r json 'users.all().filter(name?.len())'
{
"name": "Tom"
}
{
"name": "false"
}
{
"name": true
}

Find users with an empty or missing name field.

$ echo '{
"users": [
{
"name": "Tom"
},
{
"name": "false"
},
{
"name": true
},
{
"wrong_name": "Jim"
},
{
"name": ""
}
]
}' | dasel -r json 'users.all().filter(not(name?.len()))'
{
"wrong_name": "Jim"
}
{
"name": ""
}

Find users with a name field

$ echo '{
"users": [
{
"name": "Tom"
},
{
"name": "false"
},
{
"name": true
},
{
"wrong_name": "Jim"
},
{
"name": ""
}
]
}' | dasel -r json 'users.all().filter(keys().all().filter(equal(.,name)))'
{
"name": "Tom"
}
{
"name": "false"
}
{
"name": true
}
{
"name": ""
}

Find users without a name field

$ echo '{
"users": [
{
"name": "Tom"
},
{
"name": "false"
},
{
"name": true
},
{
"wrong_name": "Jim"
},
{
"name": ""
}
]
}' | dasel -r json 'users.all().filter(not(keys().all().filter(equal(.,name)).len()))'
{
"wrong_name": "Jim"
}
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Last modified 3mo ago